I have read that you get more berries if you have a male and female plant. How can you tell the difference?
You will have to look at the flowers. The male will have yellow staminate organs with pollen powder on them, while the female will have a central "ball" type thing that is not powdery. This article will help with its care:
https://www.gardeningknowhow.com/ornamental/shrubs/butchers-broom/butchers-broom-care.htm